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| Mirrors > Home > MPE Home > Th. List > Mathboxes > eldm1cossres2 | Structured version Visualization version GIF version | ||
| Description: Elementhood in the domain of restricted cosets. (Contributed by Peter Mazsa, 30-Dec-2018.) |
| Ref | Expression |
|---|---|
| eldm1cossres2 | ⊢ (𝐵 ∈ 𝑉 → (𝐵 ∈ dom ≀ (𝑅 ↾ 𝐴) ↔ ∃𝑥 ∈ 𝐴 𝐵 ∈ [𝑥]𝑅)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eldm1cossres 38444 | . 2 ⊢ (𝐵 ∈ 𝑉 → (𝐵 ∈ dom ≀ (𝑅 ↾ 𝐴) ↔ ∃𝑥 ∈ 𝐴 𝑥𝑅𝐵)) | |
| 2 | elecALTV 38248 | . . . 4 ⊢ ((𝑥 ∈ V ∧ 𝐵 ∈ 𝑉) → (𝐵 ∈ [𝑥]𝑅 ↔ 𝑥𝑅𝐵)) | |
| 3 | 2 | el2v1 38204 | . . 3 ⊢ (𝐵 ∈ 𝑉 → (𝐵 ∈ [𝑥]𝑅 ↔ 𝑥𝑅𝐵)) |
| 4 | 3 | rexbidv 3157 | . 2 ⊢ (𝐵 ∈ 𝑉 → (∃𝑥 ∈ 𝐴 𝐵 ∈ [𝑥]𝑅 ↔ ∃𝑥 ∈ 𝐴 𝑥𝑅𝐵)) |
| 5 | 1, 4 | bitr4d 282 | 1 ⊢ (𝐵 ∈ 𝑉 → (𝐵 ∈ dom ≀ (𝑅 ↾ 𝐴) ↔ ∃𝑥 ∈ 𝐴 𝐵 ∈ [𝑥]𝑅)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∈ wcel 2109 ∃wrex 3053 Vcvv 3444 class class class wbr 5102 dom cdm 5631 ↾ cres 5633 [cec 8646 ≀ ccoss 38162 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-12 2178 ax-ext 2701 ax-sep 5246 ax-nul 5256 ax-pr 5382 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-clab 2708 df-cleq 2721 df-clel 2803 df-ral 3045 df-rex 3054 df-rab 3403 df-v 3446 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-nul 4293 df-if 4485 df-sn 4586 df-pr 4588 df-op 4592 df-br 5103 df-opab 5165 df-xp 5637 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-ec 8650 df-coss 38395 |
| This theorem is referenced by: eldmqs1cossres 38644 |
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